The FT440 easily, quickly and reliably determines the quality of your oil. To do so, it measures the so-called „total polar material“ (TPM) content in the oil and shows its value as an accurate percentage. The Clear alarm via the colored top alarm light makes it even easier to evaluate the quality of the oil. So you always know exactly when to change your oil. The FT440 frying oil Tester prevents the direct exposure of your hand to the hot oil.